X-Band Radar Cross-Section of Tandem Helicopter Based on Dynamic Analysis Approach

Abstract

In order to study the radar signature of a tandem helicopter in the X-band, a dynamic analysis approach (DAA) is presented to determine its radar cross-section (RCS) under different influence factors. The basic passage time, rotation speed, observation angle, rotor disk inclination, fuselage attitude angle and Doppler feature are studied and discussed in detail. The results show that the dynamic characteristics of the rotor RCS will bring significant changes to the peak and average values of the helicopter RCS. Within a given observation angle range, a larger elevation angle is undesirable for helicopter stealth. The inclination of the rotor disc will affect the many small peaks and local fluctuations of the helicopter RCS. The positively increased attitude angle will have an undesirable effect on the average RCS and dynamic characteristics of the helicopter. The DAA is feasible and effective for studying the radar cross-section of a tandem helicopter.

Star-Shaped Wheel for Mechanical Micro-Doppler Modulation

“…This work has been supported by the Spanish Secretaría de Estado de Investigación, Desarrollo e Innovación under Grant RTI2018-096019-B-C33. describing a rotation around a reference axis as it is the case of rotating blades [11], [12].…”

Classification Method of Uniform Circular Array Radar Ground Clutter Data Based on Chaotic Genetic Algorithm

“…Then, the clutter data can be effectively classified based on the unsupervised clustering method [ 23 ]. The method of clutter classification and recognition is based on the difference of amplitude modulation characteristics of different echo signals in the range-Doppler domain [ 24 , 25 ], and the disadvantage of this method is that it requires a relatively high signal-to-noise ratio. In a practical case, the radar system parameters and application scenarios should be considered to determine the clutter classification characteristics to be extracted.…”